to consider somebody/something to be somebody/something, especially when you are wrong
پنداشتن, انگار کردن, فرض کردن, تصور کردن, خیال کردن, گمان کردن
Even the experts took the painting for a genuine Van Gogh.
Of course I didn't do it! What do you take me for?
I took the man with him to be his father.